发明名称 |
Liquid crystal video display device having pulse-width modulated ON signal for gradation display |
摘要 |
The present invention provides, in an active matrix liquid crystal display device of the type including non-linear elements, for the application of an ON pulse-width modulation signal by the data line driving circuit at the rearward end of each selected period, during which the voltage corresponding to the duty-cycle of the selected signal is applied to the liquid crystal layer. The result is accurate reproduction of gray-scale images in the display under conditions of high duty-cycle driving. Further, cross-talk between columns caused by the data signal is controlled by supplying a signal voltage which eliminates the residual charges in the liquid crystal layer at the end of each selected period.
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申请公布号 |
US4743096(A) |
申请公布日期 |
1988.05.10 |
申请号 |
US19870008894 |
申请日期 |
1987.01.30 |
申请人 |
SEIKO EPSON KABUSHIKI KAISHA |
发明人 |
WAKAI, YOICHI;YAZAWA, SATORU;IKEJIRI, HIROAKI;UCHIKAWA, YOSHIRO;ISUDA, MASAHIDE |
分类号 |
G09G3/20;G09G3/36;(IPC1-7):G02F1/13 |
主分类号 |
G09G3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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